> ## Documentation Index
> Fetch the complete documentation index at: https://docs.world.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Address Book

The Address Book is a contract that stores verified World ID addresses. You can check if a user's address and associated ENS name (if available) is Orb verified using the `getIsUserVerified` helper function.

## Considerations

* Default RPC is `https://worldchain-mainnet.g.alchemy.com/public`
* Contract Address is [0x57b930D551e677CC36e2fA036Ae2fe8FdaE0330D](https://worldscan.org/address/0x57b930D551e677CC36e2fA036Ae2fe8FdaE0330D#readContract).

## Implementation

The helper function connects to the World Chain and checks if a given wallet address is verified by querying the Address Book contract.

## Example Usage

```typescript theme={null}
import { getIsUserVerified } from "@worldcoin/minikit-js/address-book"

const userWalletAddress = "0x000000000000000000000000000000000000dEaD"
const isUserVerified = await getIsUserVerified(userWalletAddress) // optionally you can provide your rpc url as a second argument to the function
```

* Returns `true` if the address is verified
* Returns `false` if the address is not verified
* Throws an error if the verification check fails

## React Bindings

For React applications, we provide a hook `useIsUserVerified` that handles the verification check and loading state.